The distance between A and B is 100 kilometers. A businessman travels from A to B; he has completed the whole journey (3/5) on the first day, and the rest (3/4) on the second day. Less kilometers left after two days?
甲、乙两地相距100千米，一位商人从甲地去乙地；第一天行了全程的了(3/5)，第二天行了剩下的(3/4)，行了两天后还剩下少千米？
<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">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">100 * (2/5) * (1/4)</gadget>
<output>10</output>

<result>10</result>