Due to Xiao Liang's careless calculation, when dividing 16.8 by a number, the decimal point of the quotient is wrong by one place to the right, and the result is that the quotient becomes 105. What is the original divisor?
小亮由于计算粗心，在用16.8除以一个数时，商的小数点向右错一位，结果商变成了105，原来的除数是多少．
<gadget id="calculator">105 / 10</gadget>
<output>21/2 = around 10.5</output>

<gadget id="calculator">16.8 / (21/2)</gadget>
<output>1.6</output>

<result>1.6</result>