Use a piece of steel with a length of 30 decimeters to make parts, and each part uses steel (2/5) decimeters, how many parts can be made from this steel?
用一根长30分米的钢材做零件，每个零件用钢材(2/5)分米，这根钢材可做多少个零件？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 / (2/5)</gadget>
<output>75</output>

<result>75</result>