A car drives from place A to place B at a speed of 50 kilometers per hour, and travels the entire distance (5/7) in 3 hours. How many kilometers does this car have to drive to reach place B?
一辆汽车以每小时50千米的速度从甲地开往乙地，3小时行驶了全程的(5/7)，这辆汽车还要行驶多少千米才能到达乙地？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(5/7) / 3</gadget>
<output>5/21 = around 0.238095</output>

<gadget id="calculator">1 / (5/21)</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">(21/5) - 3</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">50 * (6/5)</gadget>
<output>60</output>

<result>60</result>