Because 12*13=156, so 1.2*0.13=how much.
因为12*13=156，所以1.2*0.13=多少．
<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">13 / 100</gadget>
<output>13/100 = around 0.13</output>

<gadget id="calculator">(6/5) * (13/100)</gadget>
<output>39/250 = around 0.156</output>

<result>39/250 = around 0.156</result>