A joke about decimal multiplication

It rained all day today. I just saw a 12-year-old boy walking by the road with an umbrella. A car quickly splashed all over the road. Children react quickly when they pass by. He pointed his umbrella at the car, and the window was ajar, splashing all over the woman in the co-pilot. I only heard a scream. Then the car stopped and came down alone. I thought the child would be in pain. Who knows the child jumped into the water and stamped his feet on it.