(2/3) of a piece of steel is (6/7) tons, how many tons does this piece of steel weigh?
一块钢材的(2/3)是(6/7)吨，这块钢材重多少吨．
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(6/7) / (2/3)</gadget>
<output>9/7 = around 1.285714</output>

<result>9/7 = around 1.285714</result>