1 ton of peanut kernels can extract (4/9) tons of oil, how many tons of peanut kernels are needed for 36 tons of oil.
1吨花生仁可榨(4/9)吨油，36吨油需要多少吨花生仁．
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">36 / (4/9)</gadget>
<output>81</output>

<result>81</result>