设被除数为a,除数为b
据题意则有：a÷b ①
再据题意又有：(a÷3)÷(b÷12)
=(a×1/3)÷(b×1/12)
=a×1/3÷b÷1/12
=a÷b×1/3×12
=(a÷b)×(1/3×12)
=(a÷b)×4 ②
由① ②可知
两个数相除,如果被除数除以3,除数除以12,现在的商是原商的4倍.