50 white socks, 70 red socks, 60 green socks, and 70 blue socks, all of the same size, how many socks must be found in the dark to ensure that at least 10 pairs of socks can be found (two socks of the same color are called a pair).
白袜子50只，红袜子70只，绿袜子60只，蓝袜子70只，大小都一样，在黑暗中至少摸出多少只袜子才能保证至少摸出10双袜子(每2只同色的袜子称为一双)．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<gadget id="calculator">4 + 1 + 18</gadget>
<output>23</output>

<result>23</result>