Xiaojun has to swim 200 meters, and he has already swum (3/5), how many meters are left to swim?
小军要游200米，已游了(3/5)，还剩多少米没游？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">200 * (2/5)</gadget>
<output>80</output>

<result>80</result>