(2/3) of a number is 180, what is (3/5) of this number.
一个数的(2/3)是180，这个数的(3/5)是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">180 / (2/3)</gadget>
<output>270</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">270 * (3/5)</gadget>
<output>162</output>

<result>162</result>