Using 5 tons of soybeans to extract 2 tons of oil, how many of the following formulas can be used to calculate how many tons of soybeans are needed to extract 1 ton of oil?
用5吨黄豆榨油2吨，下面多少式子可用于计算榨1吨油需要多少吨黄豆？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>