There are two groups of horses, one group has 5 horses, and the other group has 6 horses. Two horses are selected from each group to form a team of four horses. How many ways are there in total?
有两组赛马，一组有5匹，另外一组有6匹，从两组各取两匹组成一个四匹马的马队，共有多少种取法？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">10 * 15</gadget>
<output>150</output>

<result>150</result>