To build a wall, it takes A 10 days, A and B cooperate for 6 days, and B and C cooperate for 8 days. Now A, B and C are working together. After the completion of the building, it is found that A has built 2400 more blocks than B. So, how much did C build?
砌一面墙，甲要10天，甲乙合作6天，乙丙合作8天，现在甲乙丙一起做，砌完之后发现甲比乙多砌了2400块．那么，丙砌了多少？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) - (1/10)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / (1/15)</gadget>
<output>15</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) - (1/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) - (1/15)</gadget>
<output>7/120 = around 0.058333</output>

<gadget id="calculator">1 / (7/120)</gadget>
<output>120/7 = around 17.142857</output>

<gadget id="calculator">1 / (120/7)</gadget>
<output>7/120 = around 0.058333</output>

<gadget id="calculator">(1/10) + (1/15) + (7/120)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">1 / (9/40)</gadget>
<output>40/9 = around 4.444444</output>

<gadget id="calculator">(1/30) * (40/9)</gadget>
<output>4/27 = around 0.148148</output>

<gadget id="calculator">2_400 / (4/27)</gadget>
<output>16_200</output>

<gadget id="calculator">16_200 * (7/120) * (40/9)</gadget>
<output>4_200</output>

<result>4_200</result>