A batch of wood, the total number (2/7) is used first, and the rest (2/5) is used. At this time, the amount used is 10 square meters more than the rest. How many square meters are there in total for this batch of wood?
一批木料，先用去总数的(2/7)，又用去剩下的(2/5)，这时用去的比剩下的多10方，这批木料共有多少方？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(5/7) * (2/5)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(2/7) + (2/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">10 / (1/7)</gadget>
<output>70</output>

<result>70</result>