If (2/5)x:1.2=3:4, then x=how much.
如果(2/5)x：1.2=3：4，那么x=多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 1.2</gadget>
<output>0.9</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">0.9 / (2/5)</gadget>
<output>2.25</output>

<result>2.25</result>