Xiongfeng Socks Factory processes a batch of socks. A and B cooperate to complete the work in 6 days, and A alone makes 10 days. A makes 90 more pairs of socks every day than B. How many pairs of this batch of socks are there?
雄风袜厂加工一批袜子，甲乙合作6天完成，甲独做10天完成，甲每天比乙多做90双，这批袜子有多少双？
<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">(1/10) - (1/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">90 / (1/30)</gadget>
<output>2_700</output>

<result>2_700</result>