A pile of coal has been used up (1/3), which is exactly 450 tons. How many tons is this pile of coal in total?
一堆煤用去了(1/3)，正好是450吨，这堆煤共多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">450 / (1/3)</gadget>
<output>1_350</output>

<result>1_350</result>