Xiao Ming did 42 cross-point math problems today, and Xiao Hua did twice as many cross-point math problems as Xiao Ming. How many cross-point math problems did they do in total?
小明今天做了42道口算题，小华做的口算题是小明的2倍，他们共做了多少道口算题？
<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<gadget id="calculator">84 + 42</gadget>
<output>126</output>

<result>126</result>