A car travels from A to B, 20% of the distance in the first hour, 80 kilometers in the second hour, and 45% of the distance in two hours. How many kilometers is the total distance from A to B? ?
一辆汽车从甲地到乙地，第一小时行了全程的20%，第二小时行了80千米，两小时共行了全程的45%，从甲地到乙地全程是多少千米？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(9/20) - (1/5)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">80 / (1/4)</gadget>
<output>320</output>

<result>320</result>