Pony's class made 100 lottery tickets for sale, and only one of these lottery tickets could win the prize. How many lottery tickets does Xiao Ma have to buy to have a (1/10) chance of winning.
小马的班上制作了100张彩券销售，这些彩券中只有一张能获奖．小马要购买多少张彩券才会有(1/10)机会获奖．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / 1</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">100 * (1/10)</gadget>
<output>10</output>

<result>10</result>