There are 42 single chairs and 6 double chairs. How many people can it seat in total?
单人椅有42把，双人椅有6把，一共能坐多少人？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 42</gadget>
<output>54</output>

<result>54</result>