A/1.8=B/7.2 (AB is not equal to 0), then A/B=how much.
A/1.8=B/7.2(AB都不等于0)，则A/B=多少．
<gadget id="calculator">5 / 36</gadget>
<output>5/36 = around 0.138889</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(5/36) / (5/9)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>