In order to actively perform public financial functions and stimulate domestic demand, the Hangzhou Municipal Party Committee and Municipal Government decided to issue consumer coupons. The purchases of consumer coupons enjoy a 5% discount on face value (that is, 100 yuan coupons can be used as 105 yuan). Coupons, how much money can his family actually buy with these coupons?
杭州市委市政府为积极履行公共财政职能，拉动内需，决定发放消费券，消费券购买商品按照面值享受5%的优惠(即100元消费券可当105元使用)，小明家共有1800元的消费券，他家实际可用这些消费券买到多少元钱的商品？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 + (1/20)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">1_800 * (21/20)</gadget>
<output>1_890</output>

<result>1_890</result>