There is a basket of apples, 4 of which are 4 and 1 is left, 5 and 5 are 1, and 6 and 6 are 1. How many apples are there at least in this basket?
有一筐苹果，4个4个数余1个，5个5个数也余1个，6个6个数还余1个，这筐苹果至少有多少个？
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<gadget id="calculator">60 + 1</gadget>
<output>61</output>

<result>61</result>