40MiB是多少MB？
40MiB = 41.943MB
是41.943MB，所以说成42MB也没问题——四舍五入的误差在0.5%以内。
反过来，40MB是多少MiB？
40MB = 38.147MiB
计算公式: MB = MiB × 1.048576
该数值前后的 MiB → MB
22 MiB23.0687MB
24 MiB25.1658MB
26 MiB27.263MB
28 MiB29.3601MB
30 MiB31.4573MB
32 MiB33.5544MB
34 MiB35.6516MB
36 MiB37.7487MB
38 MiB39.8459MB
40 MiB41.943MB
42 MiB44.0402MB
44 MiB46.1373MB
46 MiB48.2345MB
48 MiB50.3316MB
50 MiB52.4288MB
52 MiB54.526MB
54 MiB56.6231MB
56 MiB58.7203MB
58 MiB60.8174MB
60 MiB62.9146MB