Divide some soaps into 5 parts on average and there are 2 pieces left, and evenly divide them into 4 parts and there are 2 pieces left. How many pieces of these soaps are there at least?
把一些香皂平均分成5份还余2块，平均分成4份也余2块，这些香皂最少有多少块？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 + 2</gadget>
<output>22</output>

<result>22</result>