How many kilograms is (3/8) in (2/5) tons?
(2/5)吨的(3/8)是多少千克．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(2/5) * 1_000 * (3/8)</gadget>
<output>150</output>

<result>150</result>