If a prime number is multiplied by a composite number from any positive integer between 10 and 20, what is the sum of all these products?
在10～20的正整数中任取一个质数与一个合数相乘，则所有这些积的和是多少．
<gadget id="calculator">10 + 12 + 14 + 15 + 16 + 18 + 20</gadget>
<output>105</output>

<gadget id="calculator">11 * 105</gadget>
<output>1_155</output>

<gadget id="calculator">13 * 105</gadget>
<output>1_365</output>

<gadget id="calculator">17 * 105</gadget>
<output>1_785</output>

<gadget id="calculator">19 * 105</gadget>
<output>1_995</output>

<gadget id="calculator">1_155 + 1_365 + 1_785 + 1_995</gadget>
<output>6_300</output>

<result>6_300</result>