How many six-digit numbers can be formed when each number from 0, 1, 2, and 3 is used.
由0、1、2、3每个数都要用到的情况下，共可以组成多少个六位数．
<gadget id="calculator">3 * 5 * 4 * 3 * 2 * 1</gadget>
<output>360</output>

<gadget id="calculator">1 * 4 * 3 * 2 * 1</gadget>
<output>24</output>

<gadget id="calculator">3 * 1 * 3 * 2 * 1</gadget>
<output>18</output>

<gadget id="calculator">3 * 2 * 1 * 2 * 1</gadget>
<output>12</output>

<gadget id="calculator">3 * 2 * 1 * 1 * 1</gadget>
<output>6</output>

<gadget id="calculator">24 + 18 + 12 + 6</gadget>
<output>60</output>

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

<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">60 + 30 + 30</gadget>
<output>120</output>

<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<gadget id="calculator">120 + 30</gadget>
<output>150</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<gadget id="calculator">360 + 240 + 120 + 240 + 150 + 300</gadget>
<output>1_410</output>

<result>1_410</result>