There are 36 tons of steel in the warehouse, 10% are used for the first time, and (1/2) tons are used for the second time. How many tons of steel are left?
仓库里有36吨钢材，第一次用去10%，第二次用去(1/2)吨．还剩下多少吨钢材？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">36 * (1/10)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">36 - (18/5) - (1/2)</gadget>
<output>319/10 = around 31.9</output>

<result>319/10 = around 31.9</result>