(7/20) tons = how many kilograms.
(7/20)吨=多少千克．
<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(7/20) * 1_000</gadget>
<output>350</output>

<result>350</result>