The weight of a pile of sand is (5/6) of (3/10) tons, how many tons does this pile of sand weigh?
一堆沙子的重量是(3/10)吨的(5/6)，这堆沙子重多少吨．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(3/10) * (5/6)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>