.calc-main { /* center / center */
}
.calc-small {
	margin-left: -130px;
}

.parent {
	display: flex;
}
.parent .first {
	flex: 1; /* shorthand for flex-grow: 1; flex-shrink: 1; flex-basis: 0; */
}
.parent .second {
	flex: 0 0 275px;
}