400 points equals several hours and minutes.

400 minutes equals 6 hours and 40 minutes.

Hours and minutes in time units are used here, 1 hour =60 minutes. So 400 minutes is converted into hours, that is, 400 divided by 60, and the quotient obtained is that the remainder of hours is minutes.

Extended data:

ancient times

In ancient times, a day was twelve hours. When western mechanical clocks and watches were introduced into China, people called the time points of China and the West "Da Shi" and "Shi Shi" respectively. With the popularity of clocks and watches, people forget "Da Shi", and "Shi" is still in use today.

In ancient times, time (big time) was not counted by 1234, but marked by ugly children and animals such as rats, cows, tigers and rabbits, which was easy to remember. The specific division of labor is as follows:

Child (mouse) is 23:00- 1:00, with zero as the punctuality;

Ugly (cattle) from one to three, with two points as the punctuality;

Yin (tiger) is from three o'clock to five o'clock, with four o'clock as the punctuality;

Mao (rabbit) is from five to seven, with six o'clock as the punctuality;

Chen (Dragon) is from 7: 00 to 9: 00, with 8: 00 as the punctuality;

It's 9 o'clock to 1 1, and 10 is the punctuality;

Noon (horse) is from eleven to thirteen, with twelve o'clock as the punctuality;

When not (sheep), it is from 13: 00 to 15: 00, with 14: 00 as the punctuality;

When the application (monkey) is 15 to 17, 16 is the punctuality;

You (chicken) are 17:00- 19:00, with 18: 00 as the punctuality;

From 19: 00 to 2 1: 00, 20: 00 is the punctuality;

The morning of the pig is from 2 1: 00 to 23: 00, and 22: 00 is the punctuality.

Source: Baidu Encyclopedia-Time Unit