To prepare a potion, the mass ratio of medicine to water is 1:100. Xiao Ming has 10 grams of a potion with a concentration of 75% on hand. Can this potion be prepared? So how many grams of water do you need to add?
配制一种药水，药与水的质量比是1：100，小明现在手头有一种浓度为75%的药水10克，可以配制这种药水吗？那么需要加多少克水？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">10 * (3/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(15/2) / 1</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(15/2) * 100</gadget>
<output>750</output>

<gadget id="calculator">10 - (15/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">750 - (5/2)</gadget>
<output>1_495/2 = around 747.5</output>

<result>1_495/2 = around 747.5</result>