To build a road, the number of meters that has been repaired is equal to the number of meters that have not been repaired (3/2). If another 30 meters are repaired, the ratio of the number of meters that have been repaired to the number of meters that have not been repaired is 7:3. How much is this road in total? rice?
修一条路，已修的米数是未修米数的(3/2)，如果再修30米，这时已修米数与未修米数的比是7：3，这条路共多少米？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 + (3/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(3/2) / (5/2)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(7/10) - (3/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">30 / (1/10)</gadget>
<output>300</output>

<result>300</result>