Xiao Wang and Xiao Zhang ride bicycles towards each other from two places. The ratio of Xiao Wang's speed to Xiao Zhang's speed is 7:6. Xiao Wang traveled 15 kilometers in the first hour, and traveled 40% of the remaining distance. , at this time happened to meet Xiao Zhang, ask for the total distance between A and B.
小王、小张骑自行车分别从两地相向而行，小王的速度与小张的速度的比是7：6，小王第一小时行了15千米，又行了余下路程的40%，这时正好与小张相遇，求甲、乙两地的总路程．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(7/10) - (2/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">15 / (3/10)</gadget>
<output>50</output>

<gadget id="calculator">50 + 15</gadget>
<output>65</output>

<result>65</result>