To manufacture a machine tool, it is planned to use 14 tons of steel for each machine, but the actual saving is (1/7), how many tons is actually saved for each machine.
制造一种机床，计划每台用钢材14吨，实际节约了(1/7)，实际每台节约多少吨．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">14 * (1/7)</gadget>
<output>2</output>

<result>2</result>