Every 10 seconds, there is a car collision, and every 20 seconds there is a big crash. How many accidents overall will happen in 4 minutes?
1 minute is 60 seconds, so 4 minutes is 4 * 60 = <T>multiply(4, 60)=240 seconds.
During this time there would be 240 / 20 = <T>divide(240, 20)=12.0 big crashes.
And also 240 / 10 = <T>divide(240, 10)=24.0 car collisions.
So in total during 4 minutes there would be 12 + 24 = <T>add(12, 24)=36 accidents.
