How much less is the greatest common divisor of 28, 14, and 35 than the least common multiple.
28、14、35的最大公约数比最小公倍数少多少．
<gadget id="calculator">2 * 2 * 5 * 7</gadget>
<output>140</output>

<gadget id="calculator">140 - 7</gadget>
<output>133</output>

<gadget id="calculator">133 / 140</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>