A section of road, 25% of the whole road was repaired for the first time, and 30% of the whole road was repaired for the second time, and there is still 45 kilometers left. How many kilometers are the total length of A and B?
一段路，第一次修了全路的25%，第二次行了全路的30%，还剩45千米，甲乙两地全长多少千米？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/4) - (3/10)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">45 / (9/20)</gadget>
<output>100</output>

<result>100</result>