The bus travels from City A to City B. It travels one-fifth of the journey in the first hour, and the remaining 30% in the second hour. At this time, it is still 84 kilometers away from City B. How many kilometers are there between the two cities?
客车从甲城开往乙城，第一小时行了全程的五分之一，第二小时行了余下的30%，这时还距乙城84千米．甲乙两城相距多少千米？
<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">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(4/5) * (3/10)</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">1 - (1/5) - (6/25)</gadget>
<output>14/25 = around 0.56</output>

<gadget id="calculator">84 / (14/25)</gadget>
<output>150</output>

<result>150</result>