已知一个铜质的五棱柱的底面积为16cm2,高为4cm,现将它熔化后铸成一个正方体的铜块(不计损耗),那么铸成的铜块的棱长是( )
— What can we learn from the story?
— No pains, no gains.
计算:5a3b2c÷10a2bc=____ .