/* Three image containers (use 25% for four, and 50% for two, etc) */
.column {
  float: left;
  width: 30%;
  padding: 5px;
}

/* Clear floats after image containers */
.row::after {
  content: "";
  clear: both;
  display: table;
}

.row {
  display: flex;
}

.column {
  flex: 33.33%;
  padding: 5px;
}