The least common multiple of natural numbers a and b is 140, and the greatest common divisor is 5. What is the maximum value of a+b?
自然数a和b的最小公倍数是140，最大公约数是5，则a+b的最大值是多少．
<gadget id="calculator">5 + 140</gadget>
<output>145</output>

<result>145</result>