(3/5) of a steel weighs (1/20) tons, how many tons does this steel weigh?
一种钢材的(3/5)重(1/20)吨，这种钢材重多少吨．
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/20) / (3/5)</gadget>
<output>1/12 = around 0.083333</output>

<result>1/12 = around 0.083333</result>