table {
  border-collapse: collapse;
  margin: 2rem;
}

td {
  text-align: right;
  padding: .35rem;
}

.divisor {
  border-bottom: 3px solid black;
}

.divident {
  border-top: 3px solid black;
  border-left: 3px solid black;
  border-right: 3px solid black;
}

.quotient {
  border-bottom: 3px solid black;
  text-align: left;
}

.remainder {
  border-top: 1px solid black;
}

.remainder:nth-last-child(n+2) {
  border-bottom: 3px solid black;
}

.flex_center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}