Zhang Xiaohua has a box of 36-color crayons. (1/9) of the box has been used up. How many are left unused?
张小华有一盒36色的蜡笔，已经用去这盒蜡笔的(1/9)，还剩下多少支没用？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">36 * (1/9)</gadget>
<output>4</output>

<gadget id="calculator">36 - 4</gadget>
<output>32</output>

<result>32</result>