The oil yield of a batch of sesame is 30%. To extract (9/50) tons of sesame oil, how many tons of this sesame seed are needed?
一批芝麻的出油率是30%．要榨出(9/50)吨芝麻油，需要这种芝麻多少吨？
<gadget id="calculator">9 / 50</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(9/50) / (3/10)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>