Does Prisma consider a transaction as one operation?

await prisma.$transaction (async (tx) => {
    await tx.user.create(...);
    await tx.password.create(...);
});

await prisma.$transaction (async (tx) => {
    await tx.user.create(...);
    await tx.password.create(...);
});

await prisma.$transaction (async (tx) => {
    await tx.user.create(...);
    await tx.password.create(...);
});

await prisma.$transaction (async (tx) => {
    await tx.user.create(...);
    await tx.password.create(...);
});

Is this one or two operations accoridng to Prisma for billing purposes?