A key can only open one lock. Now there are 10 different locks and 11 different keys. If you want to find the key of each lock, how many times do you need to try to match each lock and each key correctly?
一把钥匙只能开一把锁．现在有10把不同的锁和11把不同的钥匙，如果要找出每把锁的钥匙，最多需要试多少次才能把每把锁和每把钥匙都正确配对．
<gadget id="calculator">10 + 1</gadget>
<output>11</output>

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

<gadget id="calculator">11 * 5</gadget>
<output>55</output>

<result>55</result>