There are two natural numbers with two digits. Their greatest common divisor is 6 and their least common multiple is 90. What is the sum of these two numbers?
有两个两位的自然数，它们的最大公约数是6，最小公倍数是90，这两个数的和是多少
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">18 + 30</gadget>
<output>48</output>

<result>48</result>