In the rope skipping competition in extracurricular activities, 2 groups borrow 4 ropes each, and the other groups borrow 5 ropes, so that the remaining 12 ropes are distributed in this way; if each group borrows 6 ropes, it is just borrowed. How many ropes are there?
课外活动跳绳比赛，其中2组各借绳4根，其余的组借5根，这样分配最后余下12根；如果每组借6根，这样恰好借完．问有绳多少根？
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<result>60</result>