已知比较量(黄瓜),求标准量(西红柿),用除法:
因为黄瓜比西红柿少1/4,将西红柿看做单位“1”,所以黄瓜是西红柿的1-1/4=3/4
因此是
350/(1-1/4)
=350/(3/4)
=1400/3(千克)