There ar eno decimal places in 3.2x0 because 0x anything is 0 and 3 decimal places in 0.77x1.6. You can juat count the amout of places and that is the answer unless 0 is in the problem.
I broke it all the way day half of 51 is 25 in a half and half of 25 is 12 in half so if Jimmy lifted twice as much he may have lifted 25 in a half and bob left 12