Among 50 consecutive three-digit numbers, how many three-digit numbers are there that the sum of the three digits on the digits can be divisible by 7?
在50个连续三位数中，数位上三个数字之和能被7整除的三位数，最多有多少个．
<gadget id="calculator">50 / 10</gadget>
<output>5</output>

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

<result>10</result>