If the addition and multiplication of a two-digit number with two digits is a two-digit number, then the two-digit number is called a "powerful number". For example, 56 is a "powerful number", because 5+6=11, 5*6 =30 is a two-digit number, but 34 is not a "powerful number", because 3+4=7 is not a two-digit number. So how many are all the "powerful numbers"?
如果一个两位数两个数位的数字相加和相乘都是两位数，则称这个两位数"给力数"，如56是"给力数"，因为5+6=11，5*6=30都是两位数，而34不是"给力数"，因为3+4=7不是两位数．那么所有"给力数"的个数为多少个．
<gadget id="calculator">2 + 3 + 4 + 5 + 6 + 7 + 8 + 8</gadget>
<output>43</output>

<result>43</result>