road repairing team repairs a highway. It has repaired 20% of the total length, and then repaired another 30 kilometers. At this time, the ratio of the length of the road that has been repaired to the length of the road that has not been repaired is 3:2. The road repair team needs How many kilometers is the total length of the repaired expressway?
一条修路队整修一条高速公路，已经整修了全长的20%，接着又整修了30千米，这时已经整修的公路长度与没整修的公路长度比是3：2，这个修路队要整修的这条高速公路的全长是多少千米？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 / (2/5)</gadget>
<output>75</output>

<result>75</result>