104 mm is 4.1 inches.

Careful with your units. You probably mean millimeters, in which case 104 mm is 4.09 inches. You can simply google "104mm to inches."

However, the notation you used is 104 Mm, which is megameters. 104 million meters is 39.37 million inches.

However, the notation you used is 104 Mm, which is megameters. 104 million meters is 39.37 million inches.