There are three consecutive two-digit natural numbers whose sum is a three-digit number and is a multiple of 31. What is the minimum value of the sum of these three numbers?
有三个连续两位自然数，他们的和是三位数，并且是31的倍数．则这三个数和的最小值是多少．
<gadget id="calculator">61 + 62 + 63</gadget>
<output>186</output>

<result>186</result>