How several bytes equals a megabyte and kilobyte and gigabyte?

How several bytes equals a megabyte and kilobyte and gigabyte?

There are 1024 bytes within a kilobyte

There are 1024 kilobytes in a megabyte

There are 1024 megabytes within a gigabyte

so...

1024x1024x1024 = 1,073,741,824 bytes in a gigabyte
Yoi_55 is correct.