<div class="inputs__wrapper">
<div class="inputs">
<form action="">
<input class="input" type="text">
<input class="input" type="text">
<input class="input" type="text">
</form>
</div>
<div class="textarea">
<form action="">
<textarea class="input" name="" id="" cols="30" rows="10"></textarea>
</form>
</div>
</div>
.inputs__wrapper{
max-width: 1000px;
margin: 0 auto;
}
form{
display: flex;
flex-wrap: wrap;
width: 100%;
column-gap: 20px;
}
.input{
min-width: 40%;
flex-grow: 1;
margin-top: 20px;
}