The transport team transported a batch of flour, all (3/7) was transported in the first time, and all (2/7) was transported in the second time. The two transported a total of 45 tons. How many tons are there in this batch of flour?
运输队运一批面粉，第一次运走全部的(3/7)，第二次运走全部的(2/7)，两次共运走了45吨，这批面粉一共有多少吨？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/7) + (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">45 / (5/7)</gadget>
<output>63</output>

<result>63</result>