#parent {
	display: flex;
}
#child1 {
	flex-grow: 1;
	overflow:auto;
	width:620px;
	height:620px;
}
#child2 {
	flex-grow: 1;
	overflow:auto;
	width:620px;
    height:620px;
}
#child3 {
	flex-grow: 1;
	overflow:auto;
	width:620px;
    height:620px;
}
#sample1 {
	width:600px;
	height:600px;
}
#output_csv input{
margin: 0;
padding:4px;
width: 80px;
border: none;
}
pre{
border: 2px solid #666;
border-radius: 20px;
padding: 20px;