The car travels 6 kilometers more per hour than the van. They start at the same place at the same time. The car arrives at the city gate 10 minutes earlier than the van. When the van arrives at the city gate, the car has already passed the city gate by 9 kilometers. Find the starting point The distance to the city gate.
小轿车每小时比面包车每小时多行6千米，它们同时同地出发，小轿车比面包车早10分钟到达城门，当面包车到达城门时，小轿车已超过城门9千米，求出发点到城门的距离．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">9 / (1/6)</gadget>
<output>54</output>

<gadget id="calculator">54 - 6</gadget>
<output>48</output>

<gadget id="calculator">9 / 6</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">48 * (3/2)</gadget>
<output>72</output>

<result>72</result>