How many digits does the product 2516(25的16次方）*238（2的38次方）have?
问题描述：
How many digits does the product 2516(25的16次方）*238（2的38次方）have?
答
25^16*2^38=2^6*(25*2*2)^16=64*100^16;
所以是16*2+2=34位