What is the sum of all two-digit numbers divisible by 3?
所有能被3整除的两位数的和是多少．
<gadget id="calculator">12 + 15 + 18 + 21 + 24 + 27 + 30 + 33 + 36 + 39 + 42 + 45 + 48 + 51 + 54 + 57 + 60 + 63 + 66 + 69 + 72 + 75 + 78 + 81 + 84 + 87 + 90 + 93 + 96 + 99</gadget>
<output>1_665</output>

<result>1_665</result>