0.007398 0.0000226 0.0000000000542 0.00000000000000000000199
2个回答

0.007398=7.398x10^-3

0.0000226=2.26x10^-5

0.0000000000542=5.42x10^-11

0.000000000000000000001994=1.994x10^-21