The original rice accounted for 60% of the total grain at the grain station, and after 28 tons of rice were transported in, the rice accounted for (5/6) of the current total grain. Ask how many tons of rice this grain station originally had.
粮站原有大米占粮食总量的60%，又运进28吨大米后，大米占现在粮食总量的(5/6)，问这个粮站原有大米多少吨．
<gadget id="calculator">14 / 3</gadget>
<output>14/3 = around 4.666667</output>

<gadget id="calculator">7 / 30</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">(14/3) / (7/30)</gadget>
<output>20</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 * (3/5)</gadget>
<output>12</output>

<result>12</result>