A bus is driving from Guangzhou to Wuhan, and a truck is driving from Wuhan to Guangzhou at the same time. After 4 hours, the two cars meet, and after 3 hours, the bus is still 45 kilometers away from Wuhan, and the truck is still 3 hours away from Guangzhou. 70 kilometers, how many kilometers is the distance from Guangzhou to Wuhan?
一辆客车从广州开往武汉，同时一辆货车同时从武汉开往广州，4小时后两车相遇，相遇后又经过3小时，这时客车距武汉还有45千米，货车距广州还有70千米，广州到武汉相距多少千米？
<gadget id="calculator">45 + 70</gadget>
<output>115</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 3</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">115 / (1/4)</gadget>
<output>460</output>

<result>460</result>