My text-1 is show not set font-size equal 10px? Why

Tell us what’s happening:

When i run test,the terminator show me,my class text-1 is not set font-size to 10px, tell me why pls.

Your code so far

<style type='text/sass'>
@for $j from 1 through 6 {
  .text-#{$j} { font-size: 10px * $j; }
.text-1 {
  font-size: 10px;

<p class="text-1">Hello</p>
<p class="text-2">Hello</p>
<p class="text-3">Hello</p>
<p class="text-4">Hello</p>
<p class="text-5">Hello</p>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36.

Challenge: Use @for to Create a Sass Loop

Link to the challenge:

your browser may have a minimum font size higher than 10px, please check your browser settings