Three people, A, B, and C, watered a hundred potted flowers in the morning, noon, and evening respectively. There are 65 pots that have been watered by A; 72 pots that have been watered by B; and 73 pots that have been watered by C. How many pots are at least watered by all three of them?
甲乙丙三人分别在早上、中午、晚上为一百盆花浇水．被甲浇过的有65盆；被乙浇过的有72盆；被丙浇过的有73盆．则被三人都浇过的最少有几盆？
<gadget id="calculator">65 + 72</gadget>
<output>137</output>

<gadget id="calculator">137 - 100</gadget>
<output>37</output>

<gadget id="calculator">100 - 37</gadget>
<output>63</output>

<gadget id="calculator">73 - 63</gadget>
<output>10</output>

<result>10</result>