The mass of a wooden box is 3 kg, and when it is filled with pears, it is 33 kg. The mass of the wooden box is the amount of pears.
一个木箱的质量为3千克，装满梨后为33千克，木箱的质量是梨的多少．
<gadget id="calculator">33 - 3</gadget>
<output>30</output>

<gadget id="calculator">3 / 30</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>