The area of a piece of wood is 12 square meters, if (3/5) is used up, how many square meters are left?
一块木板面积是12平方米，用去了(3/5)，还剩多少平方米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">12 * (2/5)</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>