In proportion, if the product of two outer terms is constant, what is the ratio of the two inner terms. If 5a=3b, then ((a)/(b))=((())/(())).
在比例中，两个外项的积一定，两个内项成多少比例．如果5a=3b，那么((a)/(b))=((())/(()))．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>