After 32 kg of oil is used in a barrel, there are 38 kg left. How much oil is used in the barrel of oil?
一桶油用去32千克后还剩38千克，用去的油占这桶油的多少．
<gadget id="calculator">32 + 38</gadget>
<output>70</output>

<gadget id="calculator">32 / 70</gadget>
<output>16/35 = around 0.457143</output>

<result>16/35 = around 0.457143</result>