20peck是多少L？
20peck = 176.195L
是176.195L，所以说成176L也没问题——四舍五入的误差在0.5%以内。
反过来，20L是多少peck？
20L = 2.27peck
计算公式: L = peck × 8.809768
该数值前后的 peck → L
2 peck17.62L
4 peck35.239L
6 peck52.859L
8 peck70.478L
10 peck88.098L
12 peck105.717L
14 peck123.337L
16 peck140.956L
18 peck158.576L
20 peck176.195L
22 peck193.815L
24 peck211.434L
26 peck229.054L
28 peck246.673L
30 peck264.293L
32 peck281.913L
34 peck299.532L
36 peck317.152L
38 peck334.771L
40 peck352.391L