To manufacture a machine tool, each machine used 2 tons of steel in the past, but now each machine uses less steel than before (1/5), how many tons of steel is used for each machine now?
制造一种机床，原来每台用钢材2吨，现在每台用钢材比原来节约(1/5)，现在每台用钢材多少吨？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 * (4/5)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>