Transform scale in CSS - unexpected change font

Question

My code after hover change style of font. It is probably related to this font: 14px/1.6 "Open Sans",sans-serif; but I need this. Is it possible to get this effect (scale to 1.2) in other way? Or change this CSS? My code.

.c-data:hover .liczba{
transform: scale(1.2, 1.2);
}

HTML

    <div class="u-div">
        <div class="c-data">
            <span class="liczba"></span>
        </div>
    </div>

Answer 1

Try this working snippet

body {
  font: 14px/1.6"Open Sans", sans-serif;
}
.u-div {
  width: 25%;
  float: left;
  margin: 10px auto 20px auto;
}
.c-data {
  display: block;
  margin: 0px auto 0 auto;
}
.liczba {
  cursor: default;
  transition: all 0.2s;
  -webkit-transition: all 0.2s;
  -moz-transition: all 0.2s;
  -o-transition: all 0.2s;
  -ms-transition: all 0.2s;
  text-align: center;
  display: block;
  font-size: 80px;
  font-weight: bold;
  line-height: 80px;
}
.c-data:hover .liczba {
  font-size: 90px;
}

<div class="u-div">
  <div class="c-data">
    <span class="liczba">6</span>
  </div>
</div>